Uninterruptible power supply



FIG. 1 is a front view of an uninterruptible power supply showing our new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a perspective view thereof; and,

FIG. 8 is an enlarged reference front view thereof. 

The ornamental design for an uninterruptible power supply, as shown and described. 